java - Spring bean 配置使用来自另一个带有 grails DSL 的 bean 的静态方法

Question

在 Grails 2.3.7 上，服务公开了多个装饰器方法:

class CacheManager {
  static ReadOnlyCache getReadOnlyCache(name)
  static ReadWriteCache getReadWriteCache(name)
}

我想使用这些装饰器方法配置服务，如下所示:

beans = {
  cacheManager(CacheManager){ ... }

  pdfProcessor(PDFProcessor){
    documentCache = ref('cacheManager').getReadOnlyCache('docscache')
  }
  isbnValidator(ISBNValidator){
    cache = ref('cacheManager').getReadWriteCache('simplecache')
  }

有办法实现吗？

更新

感谢 Ian 的 suggestion ，我让这个通用解决方案起作用了:

@Singleton
class CacheManager {
  static ReadOnlyCache getReadOnlyCache(name)
  static ReadWriteCache getReadWriteCache(name)
}

beans = {
  cacheManager(CacheManager){ bean ->
    bean.factoryMethod = 'getInstance'

  cacheDecorator(MethodInvokingFactoryBean) { bean ->
    bean.dependsOn = ['cacheManager']
    targetClass = CacheManager
    targetMethod = 'getInstance'      
  }

  pdfProcessor(PDFProcessor){
    documentCache = "#{cacheDecorator.getReadOnlyCache('docscache')}"
  }
  isbnValidator(ISBNValidator){
    cache = "#{cacheDecorator.getReadWriteCache('simplecache')}"
  }

将 cacheDecorator 配置为 MethodInvokingFactoryBean，它返回单例 cacheManager，以安全地调用其方法。

Answer 1

如果您只是想确保在调用 getter 方法之前正确设置 cacheManager，那么您可以纯粹在配置级别使用类似的方法来完成此操作

cacheManager(CacheManager) { ... }

pdfDocumentCache(MethodInvokingFactoryBean) { bean ->
  bean.dependsOn = ['cacheManager']
  targetClass = CacheManager
  targetMethod = 'getROCache'
  arguments = ['somecache']
}

pdfProcessor(PDFProcessor) {
  documentCache = pdfDocumentCache
}

dependsOn 应确保在初始化 cacheManager bean 之前不会调用静态 getROCache 方法。